/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/DynamicMeshAttributeSet.h
Performs a CompactCopy of the attached overlays/attributes. Called by the parent mesh CompactCopy function.
void CompactCopy ( const [FCompactMaps](API\Runtime\GeometryCore\Util\FCompactMaps) & CompactMaps, const [FDynamicMeshAttributeSet](API\Runtime\GeometryCore\DynamicMesh\FDynamicMeshAttributeSet) & Copy )